but a later study that looked at parts of Earth's primordial crust suggested the rocks' maximum age was 4.3 billion years old, meaning it dates to the Hadean (4.6 billion to 4 billion years ago).

Due to rapid plate tectonics and bombardment during Earth’s early history, there is no geologic rock record for the Hadean period. The oldest and most primitive mafic rocks on Earth are Archean in age ...

Hadean Era (4,550-3,850 mya ... producing enough energy and heat to vaporize any water or melt any rock that may be present. Gravity also helps separate heavy elements from lighter ones.

Hadean, which makes artificial intelligence (AI) and simulation tools used by the Ministry of Defence and Nato, is urgently seeking new investors to replace Tencent. The Chinese technology giant ...